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MAX2670
GPS/GNSS Front-End Amplifier
Typical Operating Characteristics (continued)
(P IN = -40dBm, f IN = 1575MHz, inputs and outputs are terminated to 50 I , V CC = 5.0V, T A = +25 N C, unless otherwise noted.)
AMP 1 GAIN vs. SUPPLY VOLTAGE
(WITH EXTERNAL INPUT IMPEDANCE MATCH)
18.1
18.0
AMP 2 GAIN vs. SUPPLY VOLTAGE
(PIN 7 OPEN)
15.0
AMP 2 GAIN vs. SUPPLY VOLTAGE
(PIN 7 SHORT TO GND)
18.0
17.9
T A = -40°C
17.5
14.5
17.8
17.7
17.6
17.5
17.4
T A = +25°C
T A = +85°C
T A = +105°C
17.0
16.5
16.0
T A = -40°C
T A = +25°C
T A = +85°C
T A = +105°C
14.0
13.5
13.0
12.5
T A = -40°C
T A = +25°C
T A = +85°C
T A = +105°C
17.3
15.5
12.0
3.0
3.5
4.0
4.5
5.0
5.5
3.0
3.5
4.0
4.5
5.0
5.5
3.0
3.5
4.0
4.5
5.0
5.5
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
AMP 1 GAIN vs. FREQUENCY
(WITH EXTERNAL INPUT IMPEDANCE MATCH)
20
19
18
17
16
15
14
13
18
16
14
12
10
8
6
4
2
AMP 2 GAIN vs. FREQUENCY
HIGH-GAIN MODE
LOW-GAIN MODE
AMP 1 INPUT P 1dB vs. TEMPERATURE
(WITHOUT EXTERNAL INPUT IMPEDANCE MATCH)
-16
-17
-18
-19
-20
-21
12
800
1000
1200
1400
1600
1800
2000
0
800
1000
1200
1400
1600
1800
2000
-22
-40
-20
0
20
40
60
80
100
5.8
5.6
5.4
5.2
5.0
FREQUENCY (MHz)
AMP 2 OUTPUT P 1dB vs. TEMPERATURE
(PIN 7 OPEN)
FREQUENCY (MHz)
AMP 1 S11
(WITHOUT EXTERNAL INPUT IMPEDANCE MATCH)
-2.0
-2.5
-3.0
-3.5
-4.0
-4.5
-4
-6
-8
-10
-12
-14
TEMPERATURE (°C)
AMP 1 S22
4.8
-40
-20
0
20
40
60
80
100
-5.0
800
1000
1200
1400
1600
1800
2000
-16
800
1000
1200
1400
1600
1800
2000
TEMPERATURE (°C)
FREQUENCY (MHz)
FREQUENCY (MHz)
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